LTC3218EDDB#TRMPBF: Main Features and Specifications

The LTC3218EDDB#TRMPBF is an integrated charge pump LED driver from Linear Technology, designed to provide a high-efficiency solution for portable device backlighting. This compact and versatile component is ideal for driving LEDs in applications like cellular phones, PDAs, GPS units, and other handheld devices where extended battery life and space-saving are critical considerations.

Efficient Power Management

At the heart of the LTC3218EDDB#TRMPBF is a 1x/1.5x/2x fractional charge pump that efficiently converts input voltages ranging from 2.7V to 5.5V into a constant current to drive multiple LEDs. The device offers a typical efficiency of 90%, which helps to minimize power consumption and maximize battery life in portable applications.

Flexible and Programmable LED Currents

The driver supports up to eight LEDs with a total output current of up to 180mA. Each LED current can be independently programmed via a precision internal current reference and an external resistor, or through a simple I2C-compatible interface, providing flexibility and control over the brightness levels.

Robust Protection Features

The LTC3218EDDB#TRMPBF includes built-in soft-start capability to limit inrush current during startup, as well as thermal shutdown protection to safeguard the device and the LEDs from overheating. Short-circuit and over-voltage protection are also integrated, ensuring reliable operation under various conditions.

Compact and Easy-to-Use Design

This LED driver comes in a tiny, low-profile (0.75mm) 12-lead (3mm x 3mm) DFN package, which is suitable for space-constrained applications. Its small size, coupled with minimal external component requirements, enables designers to create compact, efficient lighting solutions without compromising performance.

Key Specifications:

• Input Voltage Range: 2.7V to 5.5V
• LED Current: Up to 180mA total output
• High Efficiency: Up to 90% typical
• Programmable LED Current with I2C Interface
• Protection Features: Soft-start, Thermal Shutdown, Short-Circuit, Over-Voltage
• Package: 12-lead (3mm x 3mm) DFN

The LTC3218EDDB#TRMPBF is an excellent choice for designers looking for a high-performance, feature-rich LED driver that can meet the stringent requirements of modern portable electronic devices.